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Section 150-611-103

Revision 01

Page 19

TABLE 6.  HLU-611 TEST PROCEDURES FOR A3LB OPTION

Step

Action

1

The HiGain-2 Line Hit can be looped back (NLOC in Figure 5) by sending the  (Addressable Office
Repeater) LPBK activation code 1111(F) 1111(F) 0001(1) 1110(E) for at least 5 seconds.  This causes
the HLU to enter its NLOC state shown in Figure 5.  The display on the HLU-611 alternates between
NLOC (network local loop) and the margin displays.  The Loopback Time-out option, which is user
settable to NONE, 20, 60 or 120 minutes, determines the duration of this loopback unless it is overridden
by the reception of a second identical 16 bit loopup command before the timer expires.  When this time-
out override state exists, the only way to loop the HLU down is to issue one of the three loopdown
commands listed in Step 2.  The automatic time-out mode is restored during subsequent loopback
sessions.

2

The following list summarizes the codes required to execute all the HiGain-2 loopbacks shown in
Figure 5.  Note that all code sequences must be present for at least 5 seconds.

LU=LOOPUP, LD =LOOPDOWN, NI =  NETWORK INTERFACE, CI = CUSTOMER INTERFACE.

Addressable 3 (A3LB) Repeater Loopback Commands

POSITION

NAME

CODE

HLU-611 LU FROM  NI

NLOC

1111(F)*1111(F)0001(1)1110(E)

HLU-611 LU FROM  CI

CREM

0011(3)1111(F)0001(1)1110(E)

HRU-612 LU FROM  NI

NREM

1111(F)1111(F)0000(0)0010(2)

HRU-612 LU FROM  CI

CLOC

0011(3)1111(F)0000(0)0010(2)

HRU-612 LU FROM  NI

SMJK

11000 11000 11000..

HRU-612 LU FROM  NI

SMJK

100000 100000 100000..

HRU-612 LU FROM  NI (ESF-DL)

SMJK

1111(F)1111(F)0100(4)1000(8)

HLU & HRU LD FROM NI OR CI

 

11100 11100 11100....

HLU & HRU LD FROM NI OR CI

100 100 100 ...

HLU & HRU LD FROM NI OR CI(ESF-DL)

1111(F)1111(F)0010(2)0100(4)

Note: the left most bit arrives first in all sequences.  The detection algorithm functions reliably with a
random 10E-3 bit error ratio (BER) on the facility. *  This is the HEX number for the 4 bit group.

3

The NREM and NLOC loopbacks can also be initiated from the front panel of the HLU with the MODE
and SEL pushbuttons.  See Paragraph 7.20 for details.

Содержание 150-1217-03

Страница 1: ...S 2 2 APPLICATIONS 2 3 SPECIFICATIONS 3 4 CERTIFICATION 4 5 WARRANTY 4 6 TECHNICAL ASSISTANCE 4 B FUNCTIONAL DESCRIPTION 4 7 FUNCTIONAL OPERATION 4 8 OPTIONS 7 8 9 LOOPBACKS 8 9 C INSTALLATION AND TES...

Страница 2: ...Circuit ID option 2 APPLICATIONS 2 01 HiGain 2 provides a cost effective easy to deploy method for delivering T1 high Capacity Digital Service HCDS over 1 metallic pair The fiber like quality service...

Страница 3: ...watts max Heat Dissipation 6 watts typ 8 watts max Fusing Internal connected to FUSEALARM output on pin 32 Span Voltage 170 Vdc max Margin Indicator Displays span SNR margin for both spans relative t...

Страница 4: ...klin Avenue Tustin CA 92680 ATTN Repair and Return Dept 714 832 9922 800 638 0031 6 TECHNICAL ASSISTANCE 6 01 PairGain Technical Assistance is available 24 hours a day 7 days a week by contacting Pair...

Страница 5: ...ction with the FIFO regulates the output bit rate and reconstructs the DS1 clock at the exact rate received from the remote end The HiGain 2 system operates at DS1 rates of 1 544 Mbs with up to 200 bi...

Страница 6: ...termines the shelf fusing requirements HLU 611 shelves are normally fused at 10 amps A fully loaded shelf of 13 HLU 611s draws 4 9 amps in the worst case This is well within the 10 amp fuse limit 7 16...

Страница 7: ...tes and the normal margin displays reappear If this time out occurs with an active loopback in effect the appropriate loopback message appears in addition to the loop margin messages Once the manual l...

Страница 8: ...selection The DS0 channels are blocked or unblocked by entering each channel s number Multiple channels can be selected by inserting a space between each entry After all the new settings have been ma...

Страница 9: ...in 7 or 4 in 7 in band codes to loop up the HRU NREM or CLOC respectively NLOC NREM are issued from the HLU DS1 interface CLOC CREM are issued from the HRU DS1 interface All looped states are termina...

Страница 10: ...ter in band loopback codes PWRF DIS Disables powering to the HRU 612 ENA Enables powering to the HRU 612 ZBTS ON Tells the HiGain system that the ESF frame is operating in its Zero Byte Time Slot Inte...

Страница 11: ...nsmit the AIS signal at both the HLU 611 HRU 612 T1 output ports when either of the two HDSL loops is not in sync LOSW or if a MARgin alarm occurs SAIS ENA Causes the HRU 612 to transmit the AIS signa...

Страница 12: ...on Note 910 Part 325 910 100 for more SPLB details 9 07 When T1 loopback tests are performed on the HiGain 2 system with metallic loopback connections at either end the DS1 code that exists at the met...

Страница 13: ...when power is initially applied to the 611 In order to conserve power it only remains on for 5 minutes if neither the MODE nor SEL buttons are depressed The use of either button restarts the 5 minute...

Страница 14: ...to normal 4 Have the C O tester send the HLU 4 in 7 in band loop up for 5 seconds Observe that the HLU displays the NLOC message indicating an HLU loopback is in effect 5 Repeat step 2 If the test pas...

Страница 15: ...e returned pattern 20 errors if ILR 2 were sent followed by normal looped data Note that this error pattern will repeat every 20 seconds as long as the IOR loopback pattern is being sent This same 20...

Страница 16: ...1101 D 0101 5 1110 E 1010 A TIME OUT OVERRIDE Loopback Time out Override 1101 D 0101 5 1101 D 0110 6 FAR END NIU ACTIVATE Unblock AIS pass 2 in 5 1100 C 0101 5 0101 5 0100 4 IOR POWER DOWN HLU Remove...

Страница 17: ...e returned pattern 20 errors if ILR 2 were sent followed by normal looped data Note that this error pattern will repeat every 20 seconds as long as the IOR loopback pattern is being sent This same 20...

Страница 18: ...1101 D 0101 5 1110 E 1010 A TIME OUT OVERRIDE Loopback Time out Override 1101 D 0101 5 1101 D 0110 6 FAR END NIU ACTIVATE Unblock AIS pass 2 in 5 1100 C 0101 5 0101 5 0100 4 IOR POWER DOWN HLU Remove...

Страница 19: ...he codes required to execute all the HiGain 2 loopbacks shown in Figure 5 Note that all code sequences must be present for at least 5 seconds LU LOOPUP LD LOOPDOWN NI NETWORK INTERFACE CI CUSTOMER INT...

Страница 20: ...owing list summarizes the codes required to execute all the HiGain 2 loopbacks shown in Figure 5 Note that all code sequences must be present for at least 5 seconds LU LOOPUP LD LOOPDOWN NI NETWORK IN...

Страница 21: ...followed by 5 seconds of returning data pattern followed by 231 logic errors including the frame bits occur in the returned pattern 20 errors if ILR 2 were sent followed by normal looped data Note th...

Страница 22: ...QUERY LPBK Alternate Query loopback 1101 D 0101 5 1110 E 1010 A TIME OUT OVERRIDE Loopback Time out Override 1101 D 0101 5 1101 D 0110 6 IOR POWER DOWN HLU Removes VHDSL line power 0110 6 0111 7 0110...

Страница 23: ...ming bit error occurred at HLU T1 input LBPV Local Bipolar Violation A bipolar violation has been received at the T1 input to the HLU 611 SIG Signal The HLU HRU transceivers are trying to establish co...

Страница 24: ...n being received from the DSX 1 Displayed during System Settings mode defined above CODE Line Code AMI B8ZS This is the line code that the HLU is set to receive and transmit at its DSX 1 interface Dis...

Страница 25: ...Section 150 611 103 Revision 01 Page 25 Figure 6 HLU 611 Maintenance Menu Main Menu Figure 7 HLU 611 View Span Status Display...

Страница 26: ...Section 150 611 103 Revision 01 Page 26 Figure 8 HLU 611 System Settings Menu Figure 9 HLU 611 Set Clock Menu...

Страница 27: ...Section 150 611 103 Revision 01 Page 27 Figure 10 HLU 611 View Performance Data Display Figure 11 HLU 611 View Performance History Display...

Страница 28: ...1 Page 28 Figure 12 HLU 611 View Alarm History Display Figure 13 HLU 611 Loopback Menu Copyright 1995 PairGain Technologies Inc PairGain is a registered trademark CopperOptics and HiGain are trademark...

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